Annealing-furnace.



1 E. S. DAVIS. .1N'11EA1.1NG PURNAGB. APPLICATION FILED MAY 4, 1909,

. Patented oct. 24, 1911.

.a SHE'ETSQSHBM 1.

E. VSf DAVIS.l

. ANNEALING PURNAGE.

APPLICATION FILED 11H4, 1909.

1,00*?021 Patented 0011211911.

3 SHEETS-SHEET 2.

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E. s.' DAVls.

ANNEALING PURNAGE. APPLICATION FILED MAY/, 19`09. Patented' Oct. 24, 1911 3 SHEETS-SHEET 3.

entre. srs

EDW'ABD S. DVS, OF JERSEY CITY, JERSEY, ASSIGNGR TO ROCKELL PUR-NACE COMPANY, A CORPORATION OF NEW YORK.

AnNnALiNG-FURNACE.

Specification of Letters Patent.

Patented Oct. 24, 1911.

Application filed May 4, 1909. Serial No. 493,789.

To all whom it may concern.'

Be it known that Enwann S. Davis, a citizen of the United States, andresident of Jersey City, in the county of Hudson and State of New Jersey, have invented certain new and useful improvements in Annealing- Furnaces, of which the following a specific-ation.

My invention relates to improvements in annealing furnaces and particularly, to furnaces for treat-ing small objects such as balls, cartridges, blanks, and other small. parts.

in furnaces for annealing small objects, there is usually employed a conveyer for conveying the objects under treatment from one end of the furnace tofithe other. This conveyer is usually what is known as a 'worm or screw convcyer 1n the shape of a tubular or cylindrical shell having an interi nal screw-thread, the shell being rotated by any suitable means. There is a tendency of the blanks or objects being treated to become lodged or caught in the conveyer while in transit from one end of the furnace to the other.

The principal object of my invention is to prevent the objects under treatment from becoming caught or stuck in the conveyor.

Other objects of the invention are to improve and simplify the construction of the furnace. y

in its preferred form my invention comprises a furnacebody in which there is mounted a rotary screw conveyer for containing the objectsunder treatment and for conveying the objects from one end of the furnace to the other. This 'conveyer may of course be operated by `any suitable means, such as worm and gear connections. The furnace is provided with a burner, preferably an oil or gas burner. The furnace bodyis mounted on a suitable support and for the purpose of preventing the objects from becoming clogged in the conveyer, the furnace is preferably mounted so as to tilt. This mounting of the furnace preferably consists of a hinge joint between the end port-ion of the furnace and the support. The opposite end of the furnace body is provided with dependent supporting legs or members which'serve normally to support the furnace body in a horizontal position.

i Means are provided for elevating the end of the furnace to impart an inclination to the conveyer and this means preferably consists of a dependent rack on the end of the furnace which is engaged by a pinion, the

inion beinO' o )erated b i an i suitable means such a hand-wheel and gear connections. lV hen the hand-wheel or other means is operated, one end of the furnace body will be lifted so as to incline the .furnace and the conveyer therein at an angle to the horizontal. The objects being fed in at the upper end of the conveyer, they will, of their own weight, assist the feeding operation of the conveyor. By lchangingvthe inclination of the coiiveyer the rate or speed of the feeding' operation may be adjusted to suit different conditions.

'In the accompanying drawings is illustrated the preferred embodiment ofthe ,invention but various changes in the construction, combination and arrangement of parts may be made without departing from'the scope of the invention.

Figure l a side elevation of my improved annealing furnace in its-normal horizontal position. Fig. 2 is an end view looking at the feeding end of the furnace. Fig. 3 is a longitudinal sectional view ofthe fur-- nace 'taken on line ri-3 of Fig. 2, the furnace being tilted to facilitate Athe feeding operation of the conveyer.

Like reference characters indicate corresponding parts throughout the several views.

The support to the furnace is here shown in the shape of a fraliie 1. The furnace body 2 is of a usual type and is provided in its upper portion with a combustion chamber 3 and in its lower part .vith.aJ heating chamber il wherein is mounted the conveyer 5. This conveyer preferably consists of and is here shown as a cylindrical hollow casing provided with internal worm or screwthreads 6. The 'ends of the cylindrical conveyer' are of reduced diameter and form journals resting upon rollers 7. The conveyer 1s preferably .rotated by means of a -worm S engaging a worm gear 9-'011 one endet the cylinder', the worm being operated by any s uitablemeans,V such as a sprocket-wheel l0, sprocket-chain 1l and driving sprocket l2. Oo account of simplicity and ease of operation, the conveyer is preferably of the worm kor screw type illustrated but of course the form of the conv veyer may vary, as well as'the means for operatingthe same. l I At one end of the furnace, preferably that end which is uppermost' when the furnace l is tilted, there i3 provided n 'feeding hopper j The ohjeots to he treated are placed in` this; hopper which is in coinuiunication with 5 the conveyor and the hopper may he carried hy the fui-noce itself or hy the extended end of the conveyor. This latter forni is illus truted in the di iwings und it will he noir-d that the hopper is :iliixed to the and oi? the conveyor, the hopper being vFrosio-conicul in j .shape und beingV provided `with n internal l flange or threzul lft which ruthv as the con' Voyer is rotateil, 'to feed the olij ets into the l end ot the com jor. The ouhvarifl end ot'i the hopper is provided with a, retaining l flange l5.y j l lin order thnt the furnace muy l, r tilted to l change the inclination ot the consejera there l l i i i i preterahly proriified u hinge joint or joints lo hetneen one end portion olf the furnace und the support, This hinge joint may he of anjr desired form hut prol'eruhly one of the hinge n'ienihers is curried h5' the furnznl'e bod;V :1nd the other hinge Iniffuilwr in enrried ,5 hy the support, the tivo uieinheiz,l heini; pirl oled together h v n, hinge pin or pinflo l l Sit the opposite end of the 'lurnuee hodj' there nro provided dependent or supporting meinhergw iti which norinulljf' engage the furnace support to hold the ,l'urnmfe in n. lmrizontnl position.

l'lro ineens for adjusting v(he inclination of the conveyor const p'relierahly ot u dependent .ruoli 19 on tile end of the furnace, u'hieh engugeil ln* the pinion 2O ..'hirh. may ile operated hy any `uiuhle means. These n'ieaun` however, preferably ronuiut oll :L inindwrlu'el 2i on u sha1. 2i, the slm'lt lui'r4 :i herel gear D52 engaging :i lieve-l geur 24. on a n'orni shu'lft Q5, mid n'orin shaft corl'yinn u n'orlu 2i? meshing' with a worin geur QT on the shall, the nha'tt 2S also Corrying the pinion which meshes with the ruoli. The, supportingl shaft ol' the pinion nuiy he convenientlj'r jourualed irmwre11 oly in the Support or laupportingr irzuui. rl`he rack is curved on un uro hui ingy the hinge joint us its centerj :is ihe l'urnnoe is zulupted to' Swingy on 'thin4 rouler.

in orilor that the conveyor inny lhe operuied irrespertire olf tho tilted position ot the fornire. the dririno menne must he arranged on the une renier un the hinge joint and tor thin` reason 'the driving gear lvis pre'torahly journalod directlj7 on the hinge pin 1T. This driving geur only in turn be runner-led with :in v suituhie source of power, as liv nuuns of u, sprocket 9*) and chain B0.

The hurner ill, which discharges into the inlet 2 leading' to the combustion ehzunoer muy he ot' any desired type. The `fuel feeding omineeliions 33 to the hnrner :ire provided `with n swivel joint iliin :ilineinent with the center of the hinge joint eo that;

iii)

the burner niej' oleo loe operated irreepeetivo of the tilted position of the furnace. Il. pier or balilo nniy he arranged in liront of the hurner opening' in the usual nmnner7 so :nl: io distribute the luel evenly throughout the combustion ohainher. tn arch il@ .separates the combustion and heating ehuuihers und this nrrh is proviiiled 'with perforaiions or opening@ l? permitting' n lroe eirenlzilion olf the heating grises between the two chambers. Vente 23S uro jnorided iu the top of the coinlmeiion clnunher end the size ol' the rents inni' he regulated by ineanS ot the slides/B9, which ure operated by Suitable handles 40.

Vin operation. the objects to he. annealed or treated ure plnred in -the hopper at the upper or feit-dine` end of the renvoyer end the conveyor being rotated or zui'hihle poner the ohjectn ure gradually fed to the opposite end of the confit-,yer where there is provided zin opening` 'f1- l .in the oonreyer in line with the exit opening l2 in the furnace. l rliuelnirge chute #lf3 muy iorzo e c ntinuotion oi the exit ojnfning in the l'u Lice to direct the objects: into n cooling tnnlr or other `re eoptucle All. ln this way :ill the objects nre suhjooted to an even heat and the time or period ot the lientingg` niej' he regulated by' :xdjufiting the inclination of the eonvejver oo is to cause the objects to travel faster or slmvi'ar.

'Vr'hat is claimed, is:

1. ln combination, a supporting freine, o tui-nooo hody pivotalljY connected to the supportingl traine, n dependent roel( on the opposite end of the AFurnace bodyy :i pinion jourruiled in the supporting traine und en ironing 'the `Suid rack, driving eonnectione for operating Said piniozn and dependent .fuipporlinnl legs on the furnace body adapted to engage the frurne to norinalljT Support the 'furnace in an approxinuitely hori zontal position.

:2. ln ronzhinntion with n supporting 'traine und a 'furnace mounted thereupon, i rotary Conreyer iu the 'furnace having an inlet und a. dincharge end. means for operating the conveyor, pivotal connections hotween the Supporting traine and one end of the tui-none. dependent legs on the opposite end of the 'furnace adapted to normally Support the furnace in o horizontal. position, o dependent ruoli on the said opposite end of the furnace, n pinion engaging Said rack and yjournnled in the trane, Worin und geur Lili' connections for operating" said pinion, and,

fifi@ 'n tiiting movement, :said furnace having Lemmi .i

the foraine, a, pinion on said shaft engaging the rack a'oi'eaitl, e worm gear on :said shaft, a vvorni engaging said vvorin gear, and Ineens for operating the worin.

elf. The combination with :1 support and a iinnziee body mounted thereon,a hinge joint between the support and urnacebody, a burner carried by the furnace, a Conveyer within he furnace, driving connections for sr'ri eonveyer, and fuel feeding connections to the burner, having euch a renter of movement Corresponding to the center ot the hinge connection, rife-ii dependent from l the furnace body, a Vpinion meshing with Said rack, and means 'for operating said pinion.

in en annealing furnace, n "non`r provided with a combustion ehamb r and a heating chamber, an arch Separating the two chambers havingr ooeninge furnace and therein perniiiting connnnnication between the two Chalnibers, a burner discharging into the combustion chamber zi srrew eonveyer in the heating chamber, ,means for changing the inoiination of the Screw conveyor and nieani: for operatinf" the conveyer irrespeetive o' the position of ihe Same.

o. in combination, a furnace body mounteil with a hinge goint so as to be capabio of comn'innicating combustion and heating (chambers, a burner or burners carrnrl by 'he furnace and discharging into the conibnstion rlnnnber, fuel feeding; connection' joint` corresponding to the Center oi? the hinge goint, a rotary conveyor Within the heating rhainoer of the rui-nere, and driving connections for Sinti. conveyor also hirvinf` a center of inove'nent (for pending to vith :i tiitnble furnace 'eyer within the saine insione penning the renter of the hir T. in rornbinatn body, ii rotary con raising einailer ionr l l. the ond wah, one furnace. bear ii on the oxiierica' oi the fornace body en ingl .said jonrnzil extensions; 'ifor rotate-,bly porting; the renvoyer, n hopper] Corrieri by one Aenti of the ronveyeri :inil driving: menne engaging the opposite enri the con."

veyeiz A 'fnrnare bozly mounted to iit anii buv :i perforated arch dividing: the inrnznre into combnslion and healingr rhanibere, a burner or burners discharging into the combustion rhnniber, a rotary conveyor jonz'nnici'l to revolve Within the heatingr chamber, a Supply hopper at. one end o the x ronreyer, 'and the conveyor having' a li rho fle outlet at its oppoite enti.

tnrnaee borly-Inoiintml to tilt havin;r a, perforated arch dividing lw V nare into an upper combustion haar and' a lona-r beati" rlninber, a burner or bornthe eoinlnistion chainami inrber, a rotary conveyor Within the heating chamber having n discharge outlet at one end, and :i hopper carried by the opposite end of the conveyer.

10. in combination with n Sup )o1-t, a inrnace body joiirnaled thereon with its end ln'ojeoling beyond the end of the support and the body havinga, ,discharge outlet in said end, ineens for elevating the opposite enil of the furnace body, a rota ry Conveyer Within the furnace body having a. discharge opening at one enel in line with the fliselinrge outlet, and a rotary hopper carried by the opposite enf]` of the conveyor.

il. in combination, zi furnace body niounteii .so to tiit an-fl provided with a perforated, arch dividing the furnace into eonnnnnioatine combustion and heating chambers, a burner or burners' discharging into the combustion chamber, a conveyer iocated within the heating chamber and pro vi ed at one end with an iniet lnipper there- 'L-o, and a discharge outlet troni the opposite end of the conveyer.

l2. in eoinbination, :i supporting freine, a furnace body pirotnlly Connected to the supporting frame, a conveyer within the furnace body, a dependent rack on the end of the furnace bofiy, ai, pinion jonrnrlleti in the supporting traine and engaging the seid rel, driving; Connections foroperating said. pinion, anni ilepenvflent supporting iegs on the furnace body :nilapted to engage the frame to normally Support the nr in a snbstiintialiy horizontai position.

13. An :inneaiing inrnoee comprising a, tiitable fnrnaee body, a closed oyiincier jonrnnied within the furnace body and provided with zi feeding serew on its interior walls, means for roating said Cylinder, a

rot: the he n, rotary conveyor having an enlarged cylin- (lricei porion located Witl'iin Ythe furnace body, and resrieterl neck portions extendingl through he weils of the furnace body, an inlet hopper carried by one of said restricted neel(` portions; of the conveyor, a drive gen1' on the oppoisito ono ot' said restricted neel; portions, and the enlarge rylinalrieal portion of the conveyor having a lisvhargo opening' therein ab a point iarthezt from the inlet hopper.

l5. A tilliabie furnace body divided into communicating combustion an@` heat-infr 'lnxinber.-;, n burner or burners dlaehargii imo the uonibnslion rhambor, a eonveye to rotaie within the heating Chamb-er, means for imparting rotation to 14 In i'zoxnbination with :i furnace body,

saifi conveyor, e eeci hopper located et one end of the eonveyer, seid. conveyei" having an outlet opening near its opposite end, and the beating chamber having e discharge outlet in the bottoni thereof in line With the onziet opening in the conveyor.

1G. nin combinzition7 a support and :L fuian :once body mounted thereon, e Conveyei within the fui-nece body, a, pivotal connection between the support and fui-nace body, ineens 'for tilting the fui-nace body with respect to the support, :t burner carried by the itni'nzice, and driving Connections for the eonveyeir end fuel feeding connections for the burner having each ay center of move ment corresponding to the center of the pivotal connection, whereby the furnace may 'be operated in any position.

Looigoei i7. In :in annealing furnace, e fnrnzice body provided with a, combustion chainber and a heating chamber, on arch separating the two chambers having openings therein permitting communication between the two chambers, ay burner discharging into the combustion chamber, a eonveyer in the heating chamber, means for changing the :inclination of the conveyor, and means for operating the conveyor irrespective of the position of the same.

Signed at New York city in the county of New York anni. State of New York. this 2nd day of Mai-ch L 1909.

RDX/YARD S. HAVES.

Witnesses Pimm? lS. iioLicAN, DAVID JRANT. 

